Floral biology and pollination strategy of seven Tacca species (Taccaceae)

Kek Shen Chua; Art Borkent; Sin Yeng Wong

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Floral biology and pollination strategy of seven Tacca species (Taccaceae)

机译：七花授粉生物学和策略龙虾物种(Taccaceae)

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We investigated the floral characteristics, floral biology and floral visitors of the six Bornean Tacca species: T. bibracteata (only floral characteristics), T. borneensis, T. havilandii, T. leontopetaloides, T. palmata and T. reducta, and T. cristata from Peninsular Malaysia. All species are protogynous with pollen strings extruded post flower opening. Blooming of all species started from dawn except for T. leontopetaloides which flowered from dusk. While T. borneensis, T. cristata, T. havilandii,T. leontopetaloides and T. reducta are facultatively autogamic as the pollen/ovule ratios (P/O ratios) were low, T. bibracteata is facultatively xenogamic as its P/O ratio was higher. Four species (T. borneensis, T. cristata, T. havilandii and T. reducta) were tested for autonomous self‐pollination but all failed to set fruit. Manual self‐ and cross‐pollination treatments of T. borneensis, T. cristata and T. havilandii showed reduced fruit set and seed set. In contrast, T. reducta was highly self‐compatible. The showy bracts and bracteoles of T. borneensis are needed to guarantee pollination success but is not so in the other species investigated. Tacca are pollinated by two pollination guilds of female midges: two species of Forcipomyia (Lasiohelea) and Culicoides hinnoi. The floral biology and mating system of Tacca species indicate that most fruits and seeds were produced in samples resulting from natural pollination.

机译：我们调查了花卉特点、花卉六个婆罗洲的生物学和植物的游客Tacca物种:t . bibracteata(只花特征),t . borneensis t . havilandiit . leontopetaloides t palmata和t . reducta和t . cristata从马来西亚半岛。物种与花粉雌蕊先熟的字符串挤压后的花开放。物种从黎明开始除了T。leontopetaloides花从黄昏。T . borneensis, T . cristata, T . havilandii, T。leontopetaloides和t . reducta是兼性autogamic花粉/胚珠比(P / O比率)低,t . bibracteata兼性吗xenogamic P / O率更高。物种(T . borneensis T . cristata T。havilandii和t . reducta)进行了测试自治自我授粉,但所有未能设定水果。治疗的T . borneensis T cristata和T。havilandii显示减少水果和种子集合。相比之下,t . reducta高度自我兼容。的t . borneensis需要保证授粉成功,但并非如此物种调查。授粉公会的雌虫:两个物种Forcipomyia (Lasiohelea)和库蠓属hinnoi。Tacca物种表明,大多数水果和种子在样品生产造成自然吗授粉。

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《Nordic Journal of Botany》 |2020年第2期|Floral biology/1-Floral biology/14|共14页
作者
Kek Shen Chua; Art Borkent; Sin Yeng Wong;
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作者单位

Inst. of Biodiversity and Environmental Conservation, Univ. Malaysia Sarawak, Kota Samarahan, Sarawak, Malaysia;

Inst. of Biodiversity and Environmental Conservation (IBEC), Univ. Malaysia Sarawak, Kota Samarahan, Sarawak, Malaysia;

Royal British Columbia Museum, and American Museum of Natural History, Salmon Arm, BC, Canada;

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正文语种英语
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关键词
Tacca; fruit set; mating systemSeedsPollinationopen pollinationCulicoidesFruitingBiological Science DisciplinesMalaya (Diptera);

机译：Tacca;水果组;systemSeedsPollinationopen交配DisciplinesMalaya (Diptera);

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Floral biology and pollination strategy of seven Tacca species (Taccaceae)

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